Dog At Large

Our family did not get their mail last Saturday. Today the letters were delivered with "dog at large, 10.5.08" written all over them. This has caused some puzzlement. Usually special care is taken with the garden gate around the time the mailman is expected because the mailman does not like me. He has accused me of showing him my teeth. Did I somehow sneak out? Did the mail come at an odd time when I was not supervised? Was I actually "at large," and did I growl a little bit, and bare a tooth or two? Not me. It must have been stray.